D12V0M1U2S9 TVS Diode Diodes Incorporated's D12V0M1U2S9 is a 12V unidirectional TVS Diode designed to protect sensitive electronics from damage due to ESD. D12V0M1U2S9 provides ESD Protection per IEC 61000-4-2 Standard, 1 channel of ESD protection, and low channel input capacitance. The device's combination of small size and high ESD surge capability makes it ideal for use in portable applications such as cellular phones, digital cameras, and MP3 players.